51161271 has 32 divisors (see below), whose sum is σ = 81354240. Its totient is φ = 27990144.

The previous prime is 51161261. The next prime is 51161287. The reversal of 51161271 is 17216115.

51161271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51161271 - 2⁶ = 51161207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51161261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47325 + ... + 48393.

It is an arithmetic number, because the mean of its divisors is an integer number (2542320).

Almost surely, 2^51161271 is an apocalyptic number.

51161271 is a deficient number, since it is larger than the sum of its proper divisors (30192969).

51161271 is a wasteful number, since it uses less digits than its factorization.

51161271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175.

The product of its digits is 420, while the sum is 24.

The square root of 51161271 is about 7152.7107448855. The cubic root of 51161271 is about 371.2334559395.

Adding to 51161271 its reverse (17216115), we get a palindrome (68377386).

The spelling of 51161271 in words is "fifty-one million, one hundred sixty-one thousand, two hundred seventy-one".